body {
  background-color: #000;
  color: #FFCC00;
  font-family: 'Courier New', monospace;
  margin: 0;
  padding: 0;
}
header {
  background-color: #9932CC;
  padding: 20px;
  text-align: center;
  font-size: 2em;
  border-bottom: 5px solid #FFCC00;
}
nav {
  background-color: #003366;
  width: 200px;
  float: left;
  height: 100vh;
  padding-top: 20px;
}
nav a {
  display: block;
  color: #FFCC00;
  padding: 12px;
  text-decoration: none;
  margin: 6px;
  background-color: #222;
  border: 2px solid #FFCC00;
  border-radius: 10px;
}
main {
  margin-left: 220px;
  padding: 20px;
}
footer {
  clear: both;
  background-color: #9932CC;
  text-align: center;
  padding: 10px;
  position: relative;
  bottom: 0;
  width: 100%;
  color: #000;
  font-weight: bold;
}